Improvement in pulley mechanism



' intimi glitten l WILLIAM H. BROWN,

oir-BANGOR., MAINE.

team Panama. 106,993, dated september 6, Ism.I

IMPROVEMENT ICN' PULLEY MECHANISM.

The Schedule referred to in these Letters Patent and making part o! the same.

To all persons to whom those presen-ts may come:

Be it known that I, WILLIAM H. BRowN, of Bangor, of the county of Penobscot and State of Maine, lhave made a-new and useful Pulley Mechanism; and I do hereby declare. the same to be fully described in the following specification and represented in the accompanying drawing, of which- Figure ll is a top view;

Figure 2, a rear elevation; and

Figure 3, a vertical section of my inventionas applied toa driving-pulley or wheel, a driven or another pulley or wheel, and endless band or belt employed to transfer' motion from one to the other of 'the said two pulleys.

The purpose ofthe invent-ion is to enablca person to move the driven pulley and its arbor in any direction, either toward or away from him, or laterally 0r obliquely, or upward or downward, overa t-able or surface while the said driven pulley may be in revolution, and in the meantime maintain the endless belt in due tension on the pulleys.

The invention enables a lapidary or a carver to direct and operate a drill or boring-tool or rotary cut- .t'er to great advantage, and saves the necessity of moving up to the said tool or cutter the article to be wrought, which may be confined in position upon the table.

In glass-cutting and in boring, drilling, or carving various articles, the subject or work to be reduced has, often to be moved to the tool, while the latter may be in revolution, it being frequently diili- -cult to effect such movements of the work,`and whil'e so doing for the workman to properly sce the tool when and while it may he in action.

With my invention these diiculties'are overcome, as the operative has only to move his tool over the work, and while so doing he can see the tool and work, change the direct-ion ofthe former, as occasion may require.

1n the drawingv A denotes a driving-wheel or pulley mounted on a shaft, a.

rlhe driven wheel or fellow pulley is shown at B, as fixed upon a mandrel, C, sustained in suitable bearings in a carrier, D.

To this mandrel the cutting-tool is to be fixed.

The carrier is provided with a handle, '11, at or near its rear end, and at its front end it sustains two pairs of friction-rollers, c c l d, which are arranged in it in manner as shown in the drawing, particularly in Figure 4, which denotesan inner end view of such carrier.

The grooved pulley o`r wheel A, with its arbor, is arranged .within a iralne or table, E, and below its top e, in manner as represented.

An endless band, F, goes around the upper half of the periphery of the said wheel, thence continues downward underncathanl partially around two other grooved wheels, f gca.rridby a weight', G, which may or may not be provided with a clamp-screw, h,

and a nut, i, by which it may beclamped to the l frame when desirable, the clamp-screw going through a vertical slot, k, made in the frame.

' From the weight'wheels f g, the endless band is led upward through a hole, l, in the table-top, and

thence over two 'grooved wheels, m m, having their arbor n supported by twost-andards, o o, elevated on the table.

An arm H, pivoted to the said arbor, so as t0 playV up and down thereon, carries three grooved guiderollers, 11 p q, arranged in manner as represented, and to freely revolve on journals projected upward from the arm.

The endless band is next led between the rollers p p and on opposite sides of theroller q, inmanner as shown in tig. l. f

'1hencc,the said band passes betweenthe rollers of the parts of guide-rollers vc c of the carriers, and thence around the driven, or to loey driven, wheel B, in manner as shown in the drawing.

Furthermore, Insu'ally apply to the said carrier, thc rope or cord r of a counterbalance weight, s, and lead such rope across a friction-roller, t, arranged along the edge of the' frame or table, in manner as represented, the object being to counterbalance the draft on the carrier produced bythe weight G.

From the above it will be seen that, when the driving-wheel is in revolution, whatever movement may be imparted to the carrier within the range of its motion, the wheel B will be kept 'in rotation, and there will be an equal tension on the driving-huid.

The arm H, with its three guides or rollers, serves to keep the belt from moving laterally oli" the wheels m m, the guides or rollers of the carrier also operating to direct the band and keep itin place upon the wheel B.

'lhe combination and arrangement of the movable carrier D, the guide-wheels in my, and the weight G, and its guide-wheels f g, withthe driving and driven wheels A B and their endless band F, the whole be` ing applied together and toa frame or table, substantially in manner and so as to operate as described.

Also, the arrangement and combination of the arm H and its guides p p q wit-b the endless belt or band F, thewheels A 15, the carrier D, the guide-wheels m an, and the weight G and its wheels f g, the whole being applied to a table or frame, so as to operate essentially as described.-

Also, the combination vof the counterbalanee weight s with the carrier D, the driving and driven wheels` A B, the endless hand F, the guide-wheels m fm, and the weight G, arranged and applied together as and for the, purpose, and to operate as hereinbefore explained.

` W. H. BROWN.

Witnesses:

R. HjEDDY, J. R. Snow. 

